It's based on power, not level, let's see the power on each side!

You could be a lv 50 with 60k power and seeing all lv 90s (if the server have them) or you could be a lv 90 with only 35k power and sees no one above 80.

all of which, aside from summons, translate directly into power.
Which means if he have less power ANYWAY, he must be doing something wrong and is therefore weaker regardless and are therefore irrelevant.

Summon thou is a real advantage since it helps with chase, and there is also talent unlocks, those give him more options. Other than that, he have no advantage over you.